Heat pad



FIG. 1 is a front, top left perspective view of a heat pad showing my new design therefor;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plain view thereof.

Throughout the drawings the dotted lines around the perimeter represent seams. 

CLAIM The ornamental design for a heat pad, as shown and described. 